Upgrade to Drupal 9

[last updated: 2024-01-03]
Drupal home page
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• This page documents my process of upgrading from 7.99 to 9-something ...
  These steps were extracted from several places, mostly drupal.org,
  starting from here: https://www.drupal.org/docs/upgrading-drupal

• environment required for drupal-9: https://www.drupal.org/docs/understanding-drupal/how-drupal-9-was-made-a...
  PHP 7.3 is required (I'm running 7.4.33 so all good)
  MySQL 5.7.8 is required (I must upgrade from my current 5.6)

• general notes for going from 7 direct to 9: https://www.drupal.org/docs/understanding-drupal/drupal-9-release-date-a...
  Three key tools - all maybe/hopefully irrelevant for my simple site:
  • Migrate Modules: https://www.drupal.org/docs/upgrading-drupal/upgrading-from-drupal-6-or-...
    • Migrate: https://www.drupal.org/docs/core-modules-and-themes/core-modules/migrate...
      https://www.drupal.org/project/migrate - click view all releases:
      https://www.drupal.org/project/migrate/releases - select most recent
      https://www.drupal.org/project/migrate/releases/7.x-2.12 - click to download
      verify: SHA-256: 17b1a21550155ff9c2ed46492c1397b08391bfbc79fee7b607d72d683f9a59d0
      successfully downloaded and installed - did not verify sha...

      Note: I may have not scrolled down far enough when I first viewed my installed modules page,
      but in any case, now having installed the Migrate module,
      Migrate UI and three Example modules are also installed...

    • Migrate Drupal: https://www.drupal.org/docs/core-modules-and-themes/core-modules/migrate...
      https://www.drupal.org/project/migrate_drupal - view alal releases
      https://www.drupal.org/project/migrate_drupal/releases - select
      https://www.drupal.org/project/migrate_drupal/releases/6.x-1.x-dev

      SHA-256: d1b4fc1c007decde3e083730df711722c94671602cbea5b06316f53052a65d9c

      says migrate extras is required
      https://www.drupal.org/project/migrate_extras
      releases: https://www.drupal.org/project/migrate_extras/releases
      SHA-256: e35b539ca5e6bf90feaf1f8d1c18ab728cc8e0950139d1b19c3f85bf2b48a921

    • Migrate Drupal UI: https://www.drupal.org/docs/core-modules-and-themes/core-modules/migrate...
      could not find download page...
      however, see: https://www.drupal.org/project/migrate_ui
      • Upgrade using web browser instructions: https://www.drupal.org/docs/upgrading-drupal/upgrading-from-drupal-6-or-...
  • Upgrade Status module: https://www.drupal.org/project/upgrade_status
  • drupalModuleUpdater module to review drupal-7 site for module compatibility with 9: https://www.drupal.org/project/drupalmoduleupgrader
    probably irrelevant for my site

• https://www.axelerant.com/blog/ultimate-guide-migrate-drupal-7-drupal-9
  https://www.axelerant.com/blog/picking-right-drupal-migration-strategy